<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title>运算符-算数运算符</title>

	</head>
	<body>
		<script type="text/javascript">
			var x = 10;
			var y = 2;
			var sum = x + y;
			
			var sum2 = 4 + 5 + x + y;
			var en = x - y;
			var or = x * y;
			var op = x % y * sum;
			alert(or);
			alert(op);
			
			var c = (x + sum) / 4 - 3;
			alert(c);
		</script>
	</body>
</html>
